Method for knock control of internal combustion engine, involves assigning knocking limit, and determining operating point and cylinder-selective default value for gradient of knock level curve in response to firing angle

摘要

#CMT# #/CMT# The method involves assigning knocking limit, and determining an operating point and cylinder-selective default value (13) for a gradient of a knock level curve in response to a firing angle (2). The operating point- and cylinder-selective default value for the knock level curve gradient is stored in a control unit. A regulator is provided with an actual value, an adaptable reference value and a manipulated variable. An operating point- and cylinder-selective adaptation is carried out during the operation of an internal combustion engine. #CMT# : #/CMT# An independent claim is provided for a device for performing the knock control method. #CMT#USE : #/CMT# Method for knock control of an internal combustion engine. #CMT#ADVANTAGE : #/CMT# The operating point and cylinder-selective default value for a gradient of a knock level curve is determined in response to a firing angle, where an operating point- and cylinder-selective adaptation is carried out during the operation of an internal combustion engine, and thus ensures stable knock control with high control quality due to the self adaptation of the set point with reduced error identifiers of dangerous knocking combustion and improved internal combustion engine efficiency through the knock control method. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic representation of a knocking level profile depending on a firing angle. 1 : Knocking level 2 : Firing angle 3 : Knock level curve 6,9 : Knock level compensation function 7 : Knock intensity 10 : Knock limit intensity 13 : Default value.